cjboi

the hop up rubber for KSC or KWA m11a1 ns2/system 7 is the same as the MP7 GBB. The inner barrel is not the same though, due to the lining of the clip.

By the way I recently installed the dytac recoil spring and dytac hammer spring. I must say it fixed the problem so far. I dont have to pull the charging handle twice for now, before it starts to function. It took me awhile to install it because I had to wait after my exams. The dytac hammer spring did not make any difference from the stock hammer spring, they produced the same amount of FPS. Im guessing the the problem with my gun really was it wasn't pushing the whole bolt in to trigger the hammer spring. DYTAC recoil spring is really stiff compare to my old used one, its an A+ after market

buy those 14 gauge rubber bands from any piercing store and replace the stock orings. Those are way better than stock o-rings. That should fix the leakiness of your valve, other than that tighten it with a flat head screw driver. Hope this helps

I only count up to 7 to 10 when I fill my mag... and my hammer spring got weaker since I didnt know the proper way how to take the whole hammer out and to put it back in before. Now I know an easy way without bending the hammer spring individually and without even touching part # 73. I lost about 20 FPS now that my hammer spring is weak. Well I know for sure I need to get a recoil spring and hammer spring since its half cocked, so its not firing. I need the recoil spring to push the bolt carrier hard to it's place and hit the striker tip well. I don't store my gun cocked. Ill let you guys know

KWA staff knows my gun issue, I've talked to spiggy, allizard and GCW and none of them could even figure it out. I've also talked to johnny from RA TECH and he can't figure it out too and gave me an advice that it might be my hammer where it presses the output valve. The problem is, before using the gun --> full mag and everything. I have to pull the charging handle twice before it starts firing. Tiger from here told me its the bolt carrier, he said "the striker tip on the bolt carrier being too short compare to others" and so I went to buy another bolt carrier. That didn't seem to sol

dude you always say that... even at airsoftcanada.com and dont worry about it I know how to open and fix things on my gun. I actually want opinions who actually had tried installing this in their gun. But ya, my gun has an issue and I tried everything and this hammer spring and the recoil spring might do the job. Im just waiting for it to arrive.

Has anyone here tried installing the Dytac 150% hammer spring for mp7? Any improvements? It looks like this -->

never mind I figured it out....

I dont know what happened Im pretty sure I put the trigger back properly, but it doesn't seem to pull part #59 <-- that's where the trigger connects to. I wanna see how part# 59 and part# 85 should be. If you guys can open up your whole bolt system and take a picture that would be great. thanks

Can someone take a picture of an MP7 internal please... The whole bolt system, "close up". Im thinking of changing the hammer spring, it seems like I screwed something. The trigger doesn't work now. PLEASE PLEASE PLEASE

By the way if you guys are planning to change the inner barrel to TB or extended one. You will need .9mm hex key not 1mm, but ."9mm" hex key for the bolt and selector switch and 1.5mm key to open up the hop up chamber. Hope this helps

no problem they work better than stock

do you guys know if MAGPUL grips fit on these kjw m4 gbb? and which one does? thanks

if the o-ring came off the valve. you can easily replace it with 14 gauge silicone o-ring from any piercing shop. Those are way better than KWA / KSC orings in their mags. Hope this can help

My KSC mp7 Taiwan version shoots about 15 meters straight and would go up after that. Is that normal?, I'm using KSC .20g BB's. Please help i understand its only 160mm long inner barrel, but my hop up is on off/low setting. or do you guys think it does this because its such a high FPS and short inner barrel?